基于Bayes小子样理论和序贯网图检验的武器装备测试性验证试验方案设计

针对当前序贯概率比检验方法会导致测试性验证样本量无法控制,以及序贯网图检验方法未能利用先验信息使得确定的样本量仍然存在可能较大的问题,提出一种基于Bayes小子样理论和序贯网图检验相结合的测试性验证样本量确定方法。基于序贯网图检验方法,结合测试性指标的先验分布以及相关参数约束值,划分指标参数空间,并给出Bayes因子及其阈值计算方法;通过对检验点插入位置的确定,给出测试性验证所需最大样本量,同时在考虑使用方风险和承制方风险的基础上设计Bayes小子样理论下序贯网图检验的截尾策略;通过实例进行了验证,并与经典验证方法、序贯概率比检验方法、传统序贯网图方法以及验后序贯加权检验方法进行了对比分析。结果表明,该方法确定的测试性验证截尾样本量以及平均样本量均优于其他方法,同时能有效降低双方风险值。     

武器装备小子样维修性试验与评定方法研究

为了对小子样条件下武器装备维修性试验指标作出合理的验证,并且节约试验成本,本文在分析常用维修性评定方法不足的基础上,针对武器装备小子样维修性试验的特点,从工程角度出发,利用Bayes理论和验前信息,提出了利用序贯验后加权检验（SPOT）方法以及截尾SPOT方法对维修性指标进行验证评定。最后结合某型鱼雷发射装置的维修性试验与评定问题,说明该方法的有效性和可行性。     

反舰导弹维修性试验样本量确定方法改进

针对反舰导弹系统设备价格昂贵、模块化程度高,在维修性试验中不宜设置过多故障样本的特点,对G JB2072—94《维修性试验与评定》附录A中试验样本量的确定方法提出了改进意见,使维修性试验方案更具可操作性,降低了试验成本,缩短了试验周期.     

反舰导弹维修作业样本分配方法改进

结合靶场导弹维修性试验鉴定的实际,当自然故障数不满足维修作业样本量要求时,就要采用模拟或假设故障弥补样本量的不足。采用模拟故障或假设故障进行维修作业,就需要将试验样本合理分配到导弹的各可更换单元上,以充分验证整弹的维修性。针对《维修性试验与评定》中的维修作业样本按比例分层抽样分配法提出了改进意见,避免了重复性维修作业,提高了维修作业样本分配的可操作性。     

基于概率圆序贯检验的弹道一致性评定方法

现行弹道一致性评定方法的评定结果受弹丸散布、试验组数、每组用弹量等影响较大.基于数理统计、射击理论和序贯试验理论,提出了一种基于概率圆序贯检验的弹道一致性评定新方法.主要优点是检验结果不受组数和用弹量的影响,使研制方和使用方所承担的风险基本相当,能够减少试验的用弹量并节约试验成本.采用该方法分析了以往弹道一致性试验数据,结果表明,该检验方法具有一定的适用性和工程应用价值.     

基于序贯分析的制导弹药命中精度试验一次抽样方案

针对制导弹药命中精度靶场试验中采用一次抽样试验方案有时所需样本量较大,而采用序贯概率比检验方案时累积试验数变动幅度又较大的问题,提出了基于序贯分析的一次抽样试验方案。该方案将一次抽样方案和序贯分析试验结合了起来,综合了两者的优点.实例分析结果表明,该方案在保证试验精度的同时,有效地减少了累积试验数,提高了试验效率。     

维修性试验中试验样本量确定方法的研究

维修性试验中要进行维修作业,每次维修算一个样本.只有足够的样本,才能反映总体的维修性水平.根据试验样本维修时间的不同分布类型,论述了不同的样本量确定方法,为装备维修性试验中如何确定样本量提供了一种依据.     

基于Bayes方法的航空子母炸弹制导精度分析

针对风修正系列航空子母炸弹的制导精度鉴定问题,根据炸弹的试验投放情况和毁伤机理,讨论了毁伤效能战术指标与制导精度指标之间的关系。在小子样条件下,运用Bayes理论方法,提出了航空子母炸弹的制导精度和布撒均匀度鉴定方案,研究了对Bayes SPRT序贯方法的改进。仿真结果表明：所提出的方案可以减少所需的试验样本量,可以用于小子样条件下航空子母炸弹的精度鉴定问题。     

基于序贯截尾检验的一维修正弹精度评估方法

基于序贯截尾检验方法,对一维修正弹的落点密集度的评估方法进行了研究,采用Monte-carlo法给出了数值算例,仿真计算结果表明,通过序贯截尾检验方法,能够有效减少试验次数,缩短试验周期,能够为该型信息化弹药的试验鉴定提供理论参考,具有较强的理论价值和一定的参考意义.     

导弹试验中序贯检验及序贯截尾检验方案的优化设计

针对序贯检验和序贯截尾检验方法在工程实际应用中存在的一些难以解决的问题,且给试验带来一定的误差,采用蒙特卡洛随机模拟方法和现代优化设计思想,对战术导弹试验中的序贯检验和序贯截尾检验方案进行优化设计,取得了较好的效果．虽然针对导弹试验中常用的二项式分布参数的检验进行讨论,但这种优化设计方法同样适用于其它分布形式的序贯检验和序贯截尾检验．     

Nitrosation and Nitration of Tetraacetyldibenzylhexaazaisowurtzitane

Tetraacetyldibenzylhitane (TADBIW) was subjected to debenzylation by nitrosating with inorganic materials available commercially to synthesize tetraacetyldinitrosohexaazaisowurtzitane (TADNSIW). TADNSIW was purified, and its structure was determined by FTIR, 1H NMR, MS and element analysis. The debenzylation reaction of TADBIW gave quantitative benzaldehyde as a by-product. This indicates that the reaction produces an imine cation as an intermediate. Hexanitrohexaazaisowurtzitane (HNIW) was prepared from unpurified TADNSIW with the yield over 96.0 % and the purity more than 98.0 %. And the mechanism of the reaction from TADNSIW to HNIW is proposed to be oxidation of nitroso and nitration of acetyl on the molecule of TADNSIW, This reaction system involved is simple, and the reaction can complete within a short time and under mild conditions. The product can be easily to separate and the waste disposed readily.     

A Robust Algorithm for Watermarking 2D Vector Maps with Low Shape-Distortions

The technique of watermarking has been introduced into 2D vector maps for many potential applications such as protecting the copyright of important GIS （geographical information system） data and tracing the data source of military maps. In most previous works, although the validity of the map data could be preserved during the embedding procedure, the shape-distortions of the map elements are usually neglected which would tend to degrade the invisibility of the watermarking schemes. A shape-preserving algorithm for watermarking 2D vector maps is presented in this paper. A 1D distance sequence extracted from the original map is adopted as the cover data instead of 2D coordinates. A watermark bit is represented by changing the distributions of the cover data. The embedding procedure induces lower shape-distortions than in former works. Experimental results indicate better invisibility of the proposed scheme, as well as its robustness to certain attacks such as map simplification, interpolation, additive noise and most geometric transforms.     

Open Rule-setting System Applied to Conceptual Design of Engines

Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.     

Research on Linux Network Device Driver

By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux （kernel version 2.6.11 ） is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.     

Improvement and Experiment of the Reamer in Vibra Cutter Against Wave Edge of Titanium Sheet Alloy Parts

By analyzing the influencing factors of part quality making of sheet alloy of titanium by vibra cutter, the shape of upper reamer is set as cylinder and wedge-shaped form, and the lower reamer as plain and hemicycle form, and its main structural parameters are defined as well. Then it is validated further that such improved vibra cutter reamer can be used to process curve-edged parts of titanium alloy sheet. The experimental result shows that the titanium alloy sheet parts processed by above equipment have no sharpen angles for convex parts and evident crevasse of concave-edged part. In summary, such improvement can eliminate the free-waved edge and improve the manufacture quality of titanium alloy sheet parts greatly.     

Experimental Study on the Small Flyer Initiating Behavior of Fine-grained Explosives

The initiating behavior of fine-grained explosives by small flyer is studied. The diameter of small flyer in this device is 1 ram. The test results indicate that the granularity of explosives has great effect on its flyer initiating sensitivity.The flyer initiating sensitivity of the fine-grained explosives is higher and the critical initiating energy is lower than that of common explosives. For common explosive, the flyer initiating sensitivity increases as the density is reduced. But for the fine-grained explosive, the test results are exactly opposite.     

Algorithm for Multi-laser-target Tracking Based on Clustering Fusion

Multi-laser-target tracking is an important subject in the field of signal processing of laser warners. A clustering method is applied to the measurement of laser warner, and the space-time fusion for measurements in the same cluster is accomplished. Real-time tracking of multi-laser-target and real-time picking of multi-laser-signal are introduced using data fusion of the measurements. A prototype device of the algorithm is built up. The results of experiments show that the algorithm is very effective.     

Influence of Installing Error on the Surface Shape Precision of the Axial Symmetry Aspheric Workpiece in Lapping

A method to calculate the surface shape error, which is caused by the installing error between the workpiece and the lapping tool in the process of form lapping, is proposed. The mathematical model which the installing translation error influences on the workpiece surface shape error is established. The changing rule of the error is simulated through the calculating example of the paraboloid workpiece. The results indicate that the surface shape error of the workpiece is increasing with the increase of the installing translation error, it is also increasing gradually along the center point of the curve surface to the edge, and the influence is severer to the curve surface with great curvature than that of the small curvature when the translation error is the same.     

Experimental Research on Output Performances of Giant Magnetostrictive Actuator

The paper introduces the performances of magnetostrictive actuators and its applications, discusses the design methods for the structure and internal magnetic circuit of a giant magnetostrictive actuator, and makes tests on the output displacement and force characteristics for an actuator using homemade magnetostrictive material. The experimental result shows that the actuator has satisfactory output precisions and ranges in transient and stable states, and can be used in lowfrequency vibration control system of precise equipment.     

Robust Graded Sliding Mode Tracking Control for Low Speed Spinning Ballistic Missiles

The nonlinear dynamic model of spinning ballistic missiles is established during the first boosting phase of the missile. Based on the conventional backstepping sliding mode control and the assumption of a two time-scale separation of missile dynamics, a graded sliding mode controller is designed with two sub-sliding surfaces which have invariability to external disturbances and parameter perturbations, and a matrix which comprises three first order low pass filters is introduced to prevent ＂explosion of terms＂. Owing to the upper bounds of the uncertainties are difficult to obtain in advance, adaptive laws are introduced to estimate the values of the uncertainties in real-time. Eventually, the numerical simulation results given to show the proposed controller can ensure the steady flight of missiles.